What are people alluding to when they refer to "the Fall"? A. Cain's murder of Abel B. Jesus's years on earth C. Adam and Eve's removal from Eden D. God's creation of the world

When someone refers to "The Fall" they are referencing the time at which Adam and Eve disobeyed God and fell into sin, hence the name, and were subsequently cast out of the Garden of Eden.

So, the answer to your question would be

C. Adam and Eve's removal from Eden.